【单选题】酵母菌菌落特征,下面说法不正确的是( )。
D.
有些菌落因培养时间较长,会逐渐生皱,变得较为干燥
【判断题】接触电压是人触及漏电设备的外壳时,加于人手与脚之间的电位差。
【简答题】设【图片】与【图片】均为3阶矩阵,且【图片】,【图片】,则3阶行列式【图片】= 。
【单选题】Work sharing is different from job sharing in that______.
A.
it requires more working hours
B.
it provides more work positions
C.
it depends on the employer's decision
D.
it offers a more satisfactory salary
【单选题】________ refers to the horizontal expansion of a job by increasing job scope, or the number of different tasks required in a job and the frequency with which those tasks are repeated.